Roylott was sitting on a chair, with his eyes ______ the window.
_____ there was no conclusive evidence, most people thought he was guilty.
David was always ______ his best in any danger, but at that moment he froze.
As the spokeswoman said, ______ we should take action against them depends on what they will do.
In the reading room, we found her _______at the desk, with her attention ______on a book.
With more forests being destroyed, huge quantities of good earth _______each year.